Help: Polish language

[Robin40]

I don't know why, but the language of my forum changed to Polish

How can i revert to English?

For instance, editing this message I get

Napisz nowy temat (maybe Insert new topic)
Tytul (Title)

[SquareSteelBar]

Look to the bottom of the page...

[Robin40]

Look to the bottom of the page...

damn...my 71 years:cry:

[SquareSteelBar]

What are 71 years, you greenhorn? ;)

Look at this guy:
http://en.wikipedia.org/wiki/Johannes_Heesters